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//==========================================================================

//

//      bootblock_flash.c

//

//      Flash programming

//

//==========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 or (at your option) any later version.

//

// eCos is distributed in the hope that it will be useful, but WITHOUT ANY

// WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    gthomas

// Contributors: gthomas, jskov

// Date:         2000-07-26

// Purpose:      

// Description:  

//              

//####DESCRIPTIONEND####

//

//==========================================================================

#include <pkgconf/hal.h>

#include <cyg/hal/hal_arch.h>

#include <cyg/hal/hal_cache.h>

#define  _FLASH_PRIVATE_

#include <cyg/io/flash.h>

#include "flash.h"

#define _si(p) ((p[0]<<8)|p[1])

#define DEBUG 0

int

flash_hwr_init(void)

{

    unsigned short data[4];

    extern char flash_query, flash_query_end;

    typedef int code_fun(unsigned char *);

    code_fun *_flash_query;

    int code_len, stat, num_regions, region_size;

    // Copy 'program' code to RAM for execution

    code_len = (unsigned long)&flash_query_end - (unsigned long)&flash_query;

    _flash_query = (code_fun *)flash_info.work_space;

    memcpy(_flash_query, &flash_query, code_len);

    HAL_DCACHE_SYNC();  // Should guarantee this code will run

    HAL_ICACHE_INVALIDATE_ALL(); // is also required to avoid old contents

    stat = (*_flash_query)(data);

#if DEBUG

    (*flash_info.pf)("stat = %x\n", stat);

    dump_buf(data, sizeof(data));

#endif

    if (data[0] != FLASH_Intel_code) {

        (*flash_info.pf)("Not Intel = %x\n", data[0]);

        return FLASH_ERR_HWR;

    }

    // FIXME: More devices, comments, etc

    if (data[1] == (unsigned short)0x8897) {

        num_regions = 64*2;

        region_size = 0x20000;

    } else if (data[1] == (unsigned short)0x88f4) {

        num_regions = 32; // (only use one for now)*4;             // 4 devices in serial, each having 32 regions

        region_size = 0x10000;

    } else {

        (*flash_info.pf)("Unknown device type: %x\n", data[1]);

        return FLASH_ERR_HWR;

    }

    // Hard wired for now FIXME

    flash_info.block_size = region_size;

    flash_info.blocks = num_regions;

#if 0 // This should be used only for the gross XX firmware build

    flash_info.start = (void *)0;

    flash_info.end = (void *)(0x10000000+(num_regions*region_size));

#else

    flash_info.start = (void *)0x50000000;

    flash_info.end = (void *)(0x50000000+(num_regions*region_size));

#endif

    return FLASH_ERR_OK;

}

// Map a hardware status to a package error

int

flash_hwr_map_error(int err)

{

    if (err & 0x007E007E) {

        (*flash_info.pf)("Err = %x\n", err);

        if (err & 0x00400040) {

            return FLASH_ERR_ERASE_SUSPEND;

        } else

        if (err & 0x00040004) {

            return FLASH_ERR_PROGRAM_SUSPEND;

        } else

        if (err & 0x00020002) {

            return FLASH_ERR_PROTECT;

        } else

        if (err & 0x00100010) {

            return FLASH_ERR_PROGRAM;

        } else

        if (err & 0x00200020) {

            return FLASH_ERR_ERASE;

        } else

        return FLASH_ERR_HWR;  // FIXME

    } else {

        return FLASH_ERR_OK;

    }

}

// See if a range of FLASH addresses overlaps currently running code

bool

flash_code_overlaps(void *start, void *end)

{

    extern char _stext[], _etext[];

    return ((((unsigned long)&_stext >= (unsigned long)start) &&

             ((unsigned long)&_stext < (unsigned long)end)) ||

            (((unsigned long)&_etext >= (unsigned long)start) &&

             ((unsigned long)&_etext < (unsigned long)end)));

}